#include <map>
#include <string>
#include <iostream>

using namespace std;

int main()
{
    map<int, string> mapStudent;
    mapStudent.insert(pair<int, string>(1, "student_one"));
    mapStudent.insert(pair<int, string>(2, "student_two"));
    mapStudent.insert(pair<int, string>(3, "student_three"));
    map<int, string>::iterator  iter;
    for(iter = mapStudent.begin(); iter != mapStudent.end(); iter++)
    {
        cout << iter->first << " " << iter->second << endl;
    }
    return 0;
}

